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Thumbnail touch not sensitive 6 years 6 months ago #12953

manwon Topic Author Offline Junior Member Posts: 36 Thank you received: 1	My apps has many pdfs. Some pdf only have image. When I open the image pdf, the thumbnail touch will be too slow. Below video link is my situation. Video How can I improve it? Thanks.
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Thumbnail touch not sensitive 6 years 6 months ago #12957

emanuele
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Posts: 580
Thank you received: 67

Hi,

you can edit OnNoneTouchEnd method in PDFView class that recognises single tap event.
You can set the time gap and the maximum finger movement allowed to fire the single tap event:

if( timeStamp - m_tstamp_tap < 0.15 )//single tap
    {
        bool single_tap = true;
        if( dx > 5 || dx < -5 )
            single_tap = false;
        if( dy > 5 || dy < -5 )
            single_tap = false;
        if( single_tap )
        {
            [self onSingleTap:point.x :point.y];
        }
    }

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Thumbnail touch not sensitive 6 years 6 months ago #12958

manwon Topic Author Offline Junior Member Posts: 36 Thank you received: 1	Hello, I don't understand why set the timestamp condition. And what is dx and dy. Thanks.
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Thumbnail touch not sensitive 6 years 6 months ago #12961

emanuele Offline User is blocked Posts: 580 Thank you received: 67	the timestamp condition is the time gap allowed from touchesBegan and touchesEnded events (the duration of the finger on the screen). dx and dy are finger movements gap from touchesBegan and touchesEnded events.
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Thumbnail touch not sensitive